the difference is that what the group in the united states did was protected. >> reporter: the school has produced hundreds of diplomats now serving the world over including tunisia, kosovo and malta. the current ambassador to syria, robert ford, he's also a graduate here. he's been called back to the u.s. because it's too dangerous there. >> for take lot of students thinking about going -- a lot of students thinking about going into this line of work, we realize this is a potential hazard of the job. >> reporter: these two students are in their final year of study at hopkins before joining the foreign service and say the killings have not changed their career plans. >> i know that libyans and americans alike were fighting in arms against the insurgents to fight away, but sometimes these things just happen. >> reporter: president obama has ordered that security be increased at every diplomatic post around the world. the professor says that may not be enough to guarantee the safety of our diplomats. >> the marines are there to protect the information. >> the marines' primary responsibi